William m



(No Model.)

W. M. BROOKE. PERMUTATION LOCK.

No. 435,915. Patented Sept. 9. 1890.

I I I jcy o |WWill L9. n g

i|,|'| 72 b I HEINWWWIM Y a flay Jayme O o O O INVENTOR 86v @SLQQW BYWITNESSES ATTORNEY.

' UNITED STATES PATENT OFFICE.

WILLIAM M. BROOKE, OF BROOKLYN, NEW YORK, ASSIGNOR TO JOHN H. BARTON, OFSAME PLACE, AND JAMES J. EBERT, OF NEW YORK, N. Y.

PERM UTATlON-LOCK.

SPECIFICATION forming part of Letters Patent No. 435,915, datedSeptember 9, 1890. Application filed August 22, 1889 Serial No. 321,633-(NO model.)

To all whom it may concern: In the drawings the tumblers O are shown Beit known that I, WILLIAM M. BROOKE, to be triangular in cross-section;but tumof Brooklyn, county of Kings, and State of blers of other formsin cross-section may be New York, have invented certain. new and used ifthe grooves in the bolt and holders 5 useful Improvements in Locks, ofwhich the be made to correspond.

following is a full, clear, and exact descrip- IVhen the parts of thelock are assembled," tion, reference being had to the accompanyasindicated in Figs. 2 and 3, the guides 19 1) ing drawings, and to theletters of reference hold the bolt straight and the spring 0 keepsmarked thereon. the bolt-shank in contact with the tumblers To Theobject of this invention is to provide 0. \Vhen the tumbler-grooves g gare an improved permutation -lock especially brought in line beneath theboltshank, as adapted for desks, trunks, 850. shown in Figs. 2 and 3,bythe operators mov- Reference is to be had to the accompanying of thetumblers into such positions by ing drawings, forming part of thespecificameans of the studs f f, the bolt maybe easily 15 tion, in whichsimilar letters of reference inwithdrawn, because the bolt-grooves anddicate corresponding parts in all the figures. tumbler grooves are oflike depth; but if any Figure l is a front elevation of my imone of thetumbler-grooves is out of line with proved lock. Fig. 2 is a rearelevation of the the others beneath the bolt that tumbler will same withback plate removed. Fig. 3 is a prevent the withdrawal of the bolt. Itis 2o sectional elevation of the same on line 5c so, evident then thateach tumbler may have a Fig. 2. Fig. 4. is an elevation of the innernumber of grooves g g, and consequently face of the back plate. Fig. 5is a perspecmany locking and unlocking combinations tive View of one ofthe tumblers. may be made, which combinations will be in- In thedrawings, A represents the main dicated by the positions of the studs ffrela- 25 portion of the lock-case, in whose front are tively to certainof the figures m m on the two or more (in this case three) longitudinalface of the lock.

slots a a, and B is the back plate, having se- Having thus described myinvention, I cured about centrally on its inner face two claim as newand desire to secure by Letters guides 19 b, between which extends aflat Patent- 8o 0 spring 0, that is also secured at one end on 1. In akeyless lock, the combination, with the said inner face of said backplate. the case-front provided with two or more \Vithin the lock-casetwo or more (in this longitudinal slots at a, of back plate B, procasethree) tumblers O are arranged lengthvided with guides Z) Z), secured onits inner wise and parallel to each other and are held face, spring 0,tumblers 0, having transverse 5' apart in place against the case-slots aa by grooves g g and provided with studsf f, that holders D, secured onthe inner face of the project through the slots a a, holders D,procase-front, said holders being provided with vided with transversegrooves, and bolt E, transverse grooves d d, in which the said havingtransverse grooves, all constructed, ar-

. tumblers are longitudinally movable, and ranged, and operatedsubstantially as herein 9o 40 said tumblers C are provided with studsff, shown and described.

that project through the slots 0. a, convenient 2. The combination, withthe lock-case and to the hand of the operator. Each tumbler bolt andspring a, of the guides 12 b, substan- O has one or more (in this caseone) transtially as and for the purpose described. verse grooves g 9made in it, and the bolt E In testimony that I claim the foregoing I 5has formed in its shank transverse grooves have hereunto set my hand, inthe presence 72, h, (in this instance three,) corresponding of twowitnesses, this 21st day of June, 1889. in number to the number of saidtumblers.

The bolt E is designed to have its head WILLIAM M. BROOKE. firmlysecured in the top of the desk or trunk Witnesses: o to which the lockis applied, so that its JACOB I. STOVER,

shank only shall enter the lock-case. HERBERT VALENTINE.

